class_docstr: A ZMQ socket in a simple blocking API
code: def is_alive(self):
      return self.socket is not None
  
file_path: catboost/contrib/python/jupyter-client/py2/jupyter_client/blocking/channels.py
label_desc: Use image node_id 7 for calling the ZMQSocketChannel obj's underlying member method code with example usage: obj.is_alive() and returns: unknown